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Search: id:A121986
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| A121986 |
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A vector Matrix Markov affine based on the tribonacci. |
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+0
1
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| 1, 1, 1, 4, 8, 16, 32, 61, 115, 215, 399, 738, 1362, 2510, 4622, 8507, 15653, 28797, 52973, 97440, 179228, 329660, 606348, 1115257, 2051287, 3772915, 6939483, 12763710, 23476134, 43179354, 79419226
(list; graph; listen)
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OFFSET
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1,4
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FORMULA
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M = {{0, 1, 0}, {0, 0, 1}, {1, 1, 1}}; v[0] = {1, 1, 1}; v[n_] := v[n] = M.v[n - 1] + {0, 0, n} a(n) = v[n][[1]]
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MATHEMATICA
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M = {{0, 1, 0}, {0, 0, 1}, {1, 1, 1}}; v[0] = {1, 1, 1}; v[n_] := v[n] = M.v[n - 1] + {0, 0, n} a = Table[v[n][[1]], {n, 0, 30}]
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CROSSREFS
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Cf. A014125.
Sequence in context: A003199 A007096 A036313 this_sequence A145108 A108569 A111073
Adjacent sequences: A121983 A121984 A121985 this_sequence A121987 A121988 A121989
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KEYWORD
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nonn,uned
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AUTHOR
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Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 09 2006
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